1class Event_1():
2    def __init__(self):
3        self.cnt = 1
4        #
5        # Add click event to a button
6        #
7
8        btn = lv.btn(lv.scr_act())
9        btn.set_size(100, 50)
10        btn.center()
11        btn.add_event_cb(self.event_cb, lv.EVENT.CLICKED, None)
12
13        label = lv.label(btn)
14        label.set_text("Click me!")
15        label.center()
16
17    def event_cb(self,e):
18        print("Clicked")
19
20        btn = e.get_target()
21        label = btn.get_child(0)
22        label.set_text(str(self.cnt))
23        self.cnt += 1
24
25evt1 = Event_1()
26